Noemie Globius: On ultra-high energy cosmic-ray origin

Date

Time

Location

Tuesday

Oct. 10

2:00pm

726 Broadway, 902, Lg Conf

Informal Astro TalkNoemie Globius
Hebrew University

On ultra-high energy cosmic-ray origin

In the past few years new measurements (brought by experiments such as KASCADE-Grande, the Pierre Auger Observatory or Telescope Array) have radically improved our knowledge of the highest energy domain of the cosmic-ray spectrum. Recent Auger composition analyses suggest a composition getting gradually heavier above a few 10^18 eV. I will first review the recent observations (energy spectrum, composition and arrival directions). I will show that the observational data across the Galactic-to-extragalactic cosmic-ray transition can be described with minimal assumptions within a generic model putting together only one Galactic component and one extragalactic component. I will finally discuss multi-messenger constrains brought by neutrino and gamma-ray experiments.